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LM2715MT-ADJ Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de pieza LM2715MT-ADJ
Descripción Electrónicos  TFT Panel Module
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2715MT-ADJ Datasheet(HTML) 3 Page - National Semiconductor (TI)

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Pin Description (TSSOP) (Continued)
Pin
Name
Function
9
SW
NMOS power switch input.
10
V
IN
Main power input, step-up and switch circuitry.
11
SWI
PMOS switch input.
12
SWO
PMOS switch output.
13
SWC
PMOS switch control pin.
14
AV
IN
Analog power input (buffers).
15
GMA
Gamma buffer output.
16
GMA+
Gamma buffer input.
Pin Description (LLP)
Pin
Name
Function
1
Vcom-
Vcom Amplifier negative input.
2
Vcom
Vcom Amplifier output.
3
AGND
Analog Ground. Connect to AGND plane.
4
Delay
PMOS switch delay.
5V
C
Boost Compensation Network Connection.
6
FB
Output Voltage Feedback input.
7
PGND
Power Ground. Connect to PGND plane.
8
PGND
Power Ground. Connect to PGND plane.
9
NC
Not internally connected. Leave floating or connect to Ground.
10
NC
Not internally connected. Leave floating or connect to Ground.
11
SW
NMOS power switch input.
12
SW
NMOS power switch input.
13
SW
NMOS power switch input.
14
V
IN
Main power input, step-up and switch circuitry.
15
SWI
PMOS switch input.
16
SWO
PMOS switch output.
17
SWC
PMOS switch control pin.
18
AV
IN
Analog power input (buffers).
19
GMA
Gamma buffer output.
20
GMA+
Gamma buffer input.
21
NC
Not internally connected. Leave floating or connect to Ground.
22
NC
Not internally connected. Leave floating or connect to Ground.
23
NC
Not internally connected. Leave floating or connect to Ground.
24
Vcom+
Vcom Amplifier positive input.
DAP
DAP
Center Die Attach Pad. Connect directly to AGND and PGND pins beneath the device.
Pin Functions
Vcom+: Positive input terminal of Vcom amplifier.
Vcom−: Negative input terminal of Vcom amplifier.
Vcom: Output terminal of Vcom amplifier.
AGND: Analog ground connection for LM2715. Connect all
sensitive circuitry, ie. feedback resistors, delay capacitor,
and compensation network to its own dedicated AGND plane
which connects directly to this pin.
Delay: PMOS switch delay control pin. See Operation sec-
tion for setting the delay time.
The delay time begins when the output voltage of the DC/DC
switching regulator reaches 85% of its true output voltage.
This corresponds to a FB voltage of about 1.1V. The PMOS
switch is controlled with both the delay time and the switch
control pin, SWC. If no Cdelay capacitor is used, the PMOS
switch is controlled solely with the SWC pin.
V
C: Compensation Network for Boost switching regulator.
Connect resistor/capacitor network between V
C
pin and
AGND for boost switching regulator AC compensation.
FB: Feedback pin. Set the output voltage by selecting values
of R1 and R2 using:
Connect the ground of the feedback network to the AGND
plane, which should be tied directly to the PGND pin.
www.national.com
3


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